Abstract: The present invention relates to furniture such as sofas, convertible sleepers, chairs, love seats and more particularly, to furniture that can be easily assembled and disassembled, and to upholstered furniture frame. Invented Interchangeable Upholstered Furniture Frame comprises: a seat box frame, having a fabricated metal frame, a plywood front panel; a plywood back frame. The frame can accommodate arm frames, and installation of either unfolding sleeper mechanism or a standard seat.